וַֽיִּשְׁלְחוּ֙ כָּל־הָ֣עֵדָ֔ה וַֽיְדַבְּרוּ֙ אֶל־בְּנֵ֣י בִנְיָמִ֔ן אֲשֶׁ֖ר בְּסֶ֣לַע רִמּ֑וֹן וַיִּקְרְא֥וּ לָהֶ֖ם שָׁלֽוֹם׃
And the whole congregation sent and spoke to the children of Benjamin that were in the rock of Rimmon, and proclaimed peace unto them.
Read midrashic interpretation of Judges 21:13: and classical rabbinic exegesis.